I have done some with a 14 1/2" bbl without modifying the gas system and they work fine.
Do I have to enlarge the gas port hole, to run a shorter bbl. Working on a SBR RPD project. Thanks for all the great info.
Thank you..sooo much! I have seen your work...one word that is wow!
how did u put the sight on the gas block?
very nice! i want to make one i will be getting a dsa rec very soon thanks for all the great info